The Latest Version of the Speedy RC Car: Improved Performance and Design
When it comes to speed and performance, the latest version of the RC car does not disappoint. With its all-metal gear, core servo motor, and GPS speedometer, this car is designed to reach a top speed of 41 miles per hour. In this article, we will explore the improvements made to this new iteration of the RC car, from its components to its design.
The Powerful Components
One of the key components that contribute to the car’s impressive speed is its 3800 kilovolt sensor brushless motor. This motor, combined with the 6-strand receiver and GPS speedometer, allows for precise control and accurate speed measurement. To ensure a steady power supply, two 7.4-volt LiPO batteries are connected in parallel at the back of the car. Additionally, a cooling PC fan is installed to prevent overheating during extended operation.
The Design Challenge: Gears
While the overall design of the RC car may seem simple, the gears play a crucial role in its performance. In the previous iteration, a one-to-one gear ratio allowed the car to reach a speed of 30 miles per hour. Building on this success, the designer aimed for a two-to-one gear ratio in the current version, hoping to double the top speed to 60 miles per hour.
However, designing the gears proved to be more challenging than anticipated. The weight of the car and the power output of the motor needed to be carefully considered. The designer initially thought that by increasing the gear ratio, the car would be able to achieve higher speeds. Although this idea seemed plausible in theory, the practical tests would reveal the true outcomes.
The Importance of Ratios
It’s worth noting that low gear ratios are not typically recommended for achieving high speeds. The acceleration may be slow, especially on long stretches of road, making it difficult to attain top speeds. However, the designer decided to experiment with this unconventional approach.
Based on experiments and calculations involving the weight and power of the car, the gear design was fine-tuned. While the desired top speed of 60 miles per hour could not be reached with the 2-to-1 gear ratio, the car’s performance was still improved compared to the previous version.
A Blend of Progress and Familiarity
While the latest iteration of the RC car may not be radically different from its predecessor, it showcases small yet significant improvements. The focus of development shifted towards optimizing the existing components and integrating them into a new, improved body.
With a top speed of 41 miles per hour, this RC car is an impressive feat of engineering. Its enhanced performance, combined with its sleek design, make it an exciting choice for RC car enthusiasts looking for speed and precision.
In conclusion, the latest version of the RC car brings together powerful components, thoughtful design, and cautious experimentation to deliver an exhilarating driving experience. As technology advances and new ideas emerge, we can only imagine what the future holds for the world of RC car racing.
Designing Gears: An Introduction to Gear Design
Gears are an essential component in many mechanical devices and machinery. They play a crucial role in transmitting power and motion between shafts. If you’re new to the world of gear design, this article will provide a basic understanding of how gears are designed and the challenges that come with it.
The Hilco Gear Advantage
One type of gear that is commonly used for high-speed applications is the hilco gear. These gears are known for their ability to transition power smoothly, making them ideal for various industrial uses. However, there is a major downside to using hilco gears, which we will explore shortly.
Designing the First Gear
To understand the gear design process, let’s start with a basic gear. The first step in designing a gear is to determine the size of the gear, which is referred to as the module. Additionally, we need to define the pressure angle, which represents the slope of a tooth face. This angle is crucial for ensuring smooth gear operation.
Using these variables, equations are formulated to draw circles, create slots, and revolve cuts to form a perfect round. Chamfers and fillets are added as necessary to ensure the gear’s functionality. Once the basic gear design is complete, it can be manufactured using various techniques such as 3D printing or traditional machining.
Helical Gears: A Twist in Design
If you want to create a helical gear, the process is slightly different. Instead of a straight slot, the slot is cut at an angle using a Loft cut. This angled slot gives the gear its helical shape, allowing for smoother power transmission. Helical gears are commonly used in applications where noise reduction and increased load capacity are required.
The Problem with Simplified Gear Design
While the gear design process described above may seem straightforward, there is a significant challenge that arises when resizing gears. The method outlined works fine when both gears are of the same size. However, as soon as you resize the gears or use different-sized gears, the design falls apart.
The gears no longer match correctly, leading to poor performance and potential failure. This limitation highlights the complexity of gear design and the importance of precision engineering when it comes to manufacturing gears.
In conclusion, understanding the basics of gear design is crucial for anyone venturing into mechanical engineering or design. While the initial steps may seem simple, the challenges arise when dealing with variable gear sizes. It is essential to consider these factors and seek expert guidance to ensure the gears function optimally and provide reliable power transmission. Gear design may be complex, but with the right knowledge and tools, it can unlock countless possibilities in the world of mechanical systems.
Choosing the Right Gears for a Smooth Ride
When building a car, one of the most important considerations is selecting the right gears for a smooth ride. I found myself faced with this challenge recently as I attempted to make several adjustments to achieve optimal performance. Despite my best efforts, I encountered some unexpected issues along the way.
The Challenge of Axle Force
One of the adjustments I made was to the Phillips and chamfers, as well as the small geopressure angle. I also spent a significant amount of time sanding. Despite these efforts, I found that the gears were not functioning as desired. When I turned a small helical gear clockwise while holding the bigger gear still, I experienced an axle force that pushed towards the camera. When I tried turning it the other way, the force was in the opposite direction. This axle thrust was something I was aware of, but I didn’t anticipate the extent of the damage it could cause.
Damage and Stuck Mounts
The force from the axle thrust became so strong that it caused the gears to become stuck in the mount. Breaking them free required the use of leverage. This was not the ideal situation, as it was time-consuming and inefficient. While fixing the dimensions of the shaft did help alleviate this specific issue, it ultimately led to the discovery of another problem.
The Issue with the Axle and Bearing
After fixing the dimensions of the shaft, I encountered a new problem – the axle was pushing so hard on the bearing that it became melted and deformed. It became apparent that mounting the helical gear on the motor would result in either friction-induced melting or the gear shooting out from the shaft. This was a clear indication that I needed to reconsider my approach.
Returning to Tried and Tested Gears
In the end, I decided to abandon the complex gears and return to the reliable and simple straight gears with a two-to-one ratio in the proper order. By doing so, I could eliminate the issues with axle force and bearing damage. While it may not have been the most innovative solution, sometimes reverting to tried and tested methods is the best way forward.
The Importance of Prior Experience
Reflecting on the challenges I faced during this process, I realize the importance of prior experience and confidence in designing and 3D printing parts. Before embarking on this car project, I had taken the time to build the entire open RC as a prerequisite. This decision proved to be invaluable as it provided me with the necessary knowledge and skills to tackle more complex projects.
The Importance of Symmetry in Shaft Design
Introduction
When it comes to designing and constructing objects that involve rotating parts, symmetry plays a crucial role. A key example of this is the shaft design in a car. If the shaft is not symmetrical from its axis of rotation, it can easily go off balance and ultimately break from its weakest point. In this article, we will discuss the importance of symmetry in shaft design and explore possible solutions to ensure optimal performance and durability.
The Drawbacks of Asymmetry
As mentioned earlier, an asymmetrical shaft design can lead to a multitude of issues. While a car may perform well under normal driving conditions, pushing it to its limits at full throttle can prove disastrous. The imbalance caused by the lack of symmetry puts unnecessary stress on the shaft, resulting in vibrations and a higher risk of breakage.
Print Orientation and Balance
In the pursuit of creating a well-balanced shaft, 3D printing can be a valuable tool. However, the importance of proper print orientation cannot be underestimated. In one’s initial attempt at creating a balanced shaft, it became evident that the print orientation significantly impacted the outcome. By printing in landscape rather than portrait, the balance was compromised, leading to suboptimal results.
Addressing Vibrations and Fragility
Even after adjusting the print orientation, the design still exhibited vibrations and a susceptibility to breakage at high RPMs. To overcome these issues, a practical solution was discovered. By incorporating a 57mm M4 screw into the wheel hub and axle, it was found that unnecessary vibrations could be significantly reduced. The added benefit of this modification was an increase in surface area, ensuring a better fit and further enhancing mechanical strength.
Enhancing Mechanical Strength
In addition to reducing vibrations, the use of the M4 screw also provided enhanced mechanical strength. By rounding up the screw in a way that coincides with the face of the bearing, a larger volume in the middle is created. This increase in volume acts as added reinforcement when the screw is fully inserted, particularly in cases where the tap tolerance is low. The result is a more robust shaft design that can withstand demanding conditions without compromising performance.
Conclusion
In the world of engineering and design, symmetry plays a vital role in achieving optimal performance and durability. Whether it be the shaft design of a car or any other rotating object, it is imperative to ensure symmetry from the axis of rotation. By paying close attention to print orientation and implementing practical modifications, such as using an M4 screw, unnecessary vibrations can be reduced, and the mechanical strength of the design can be enhanced. Remember, symmetry is the key to a reliable and robust shaft design.
The Evolution of Wheel Hub Design
The wheel hub design is a crucial component in various mechanical systems, most notably in RC cars. Over time, engineers have worked tirelessly to perfect this design, aiming to create a seamless and efficient hub that ensures smooth performance. In this article, we will explore the evolution of the wheel hub design, discussing its simplicity, functionality, and recent advancements.
A Flawless Assembly Process
Unlike many engineering endeavors, I was fortunate enough to get the wheel hub design right on the first try. It was a rare accomplishment considering the trial and error nature of most projects. The beauty of this design lies in its simplicity – the wheel hub just slides right in effortlessly. To secure it, an M4 screw is used, which fits snugly without any complications. Finally, to mount the wheel securely, four M3 nuts and screws are utilized. This flawless assembly process is a testament to the effectiveness of the design.
An Overview of Suspension Design
The next aspect we will delve into is the suspension design. When embarking on this project, my main objective was to create a comprehensive solution that could be applied to various scenarios. Whether it be for an RC car or a completely different project, versatility was key. The basic idea was to incorporate two ball joints into the design. These crucial components allow for the easy placement and management of the suspension spring. Additionally, this design enables the smooth sliding motion of the top and bottom assembly.
Battling Challenges and Finding Solutions
Designing the perfect suspension was not without its challenges. Initially, I toyed with some unconventional ideas that unfortunately did not yield the desired results. Undeterred, I continued sketching and iterating on the design until I found a solution that ticked all the boxes. The eventual design was not only aesthetically pleasing but also consisted of fewer parts than its predecessors. However, there was one major setback – excessive wobbling.
Addressing the Wobbling Dilemma
To rectify the issue of wobbling, adjustments had to be made. The most obvious solution was to lower the tolerance of the components, thereby reducing the room for movement. However, this posed another problem – it became challenging to insert screws during the assembly process, potentially compromising the integrity of the design. Forcefully screwing through the narrow channels could result in enlargement, nullifying the purpose of reducing tolerance. This predicament required a more thoughtful approach.
In conclusion, the wheel hub design and suspension systems are vital elements in the world of engineering. The evolution of these designs highlights the constant push for innovation and improvement. From a simple and flawless wheel hub assembly process to the challenges encountered in suspension design, engineers continuously strive to create optimal solutions. With each iteration, our understanding of these components deepens, bringing us closer to the perfect design.
The Importance of Iteration in Design
Fixing the Wobbling Issue
Improved Design and the Challenges Faced
Reducing Wobble and Lubricating the Suspension
Understanding the Suspension and Steering Mechanism
Maintaining Parallelism with the Ground
The Importance of Iteration in Design
When it comes to designing and creating something new, iteration plays a crucial role. Each iteration allows designers to identify flaws, make improvements, and gradually refine the final product. This article highlights the journey of one such design and the various iterations it underwent.
Fixing the Wobbling Issue
In the initial stages of the design process, the creator encountered a significant wobbling issue. To address this problem, several modifications were made until a satisfactory solution was found. The aim was to eliminate the wobble and create a stable design.
Improved Design and the Challenges Faced
After implementing multiple changes and improvements, the designer finally came up with a more stable design. However, challenges persisted, and the design experienced frequent breakages from the small screws. The flaws within the design became evident upon examining its cross section.
Reducing Wobble and Lubricating the Suspension
To overcome the breakage issue, the designer decided to maximize the diameter in the last iteration. While this significantly reduced the wobbling problem, the design still encountered multiple breaks during a rigorous 10-day testing period. However, as long as one avoids crashing, the design remained functional.
Moreover, to ensure smooth movement and reduce friction within the suspension mechanism, lubrication became necessary. By removing one of the screws, injecting Vaseline, and reinserting the screw, the suspension could function more efficiently.
Understanding the Suspension and Steering Mechanism
Examining the suspension and steering mechanism reveals an interesting concept. When two rigid bars of the same size are connected to other same-sized, rigid bars, with only one fixed, the opposite ones will always move in parallel. This mechanism ensures that the wheel attached to the other end remains parallel to the ground, providing stability and ease of movement.
Maintaining Parallelism with the Ground
By following this design principle and ensuring parallel movement, the wobbling issue was significantly minimized. This improved design allowed for a smoother and more controlled experience. With a parallel wheel alignment, the design achieved stability and enhanced functionality.
The Importance of Triangles in 3D Design
Triangles are the backbone of many 3D designs, providing stability and strength to various structures. When creating a design in 3D, it is essential to understand the significance of triangles and how they can enhance the overall functionality and durability of the object. In this article, we will explore the role of triangles in 3D design and why they are preferred over other shapes.
Stability and Strength
One of the primary reasons why triangles are commonly used in 3D design is their inherent stability. When connected by rigid bars, triangles form a truss figure, which can bear impressive amounts of load. The triangular shape allows for compression and tension forces to be evenly distributed, resulting in a structurally sound object. This stability is crucial in applications such as bridges, antenna towers, and cranes, where the object must support heavy weights and withstand external forces.
Triangular Truss Figures vs. Frames
Trust figures, made up of interconnected triangles, are different from frames in 3D design. Trust figures have to be connected using pin joints, enabling them to distribute forces evenly and maintain their stability. On the other hand, frames are not constructed with pin joints and do not possess the same strength and stability as trust figures. By utilizing triangular cutouts in 3D designs, designers can ensure that their structures will be stable, strong, and capable of withstanding various loads.
Considerations in Manufacturing
When designing for 3D printing, the manufacturing process must also be taken into account. Triangular cutouts are often favored over circular or rectangular shapes because they are easier to print. Separating the adhering layers of a triangular structure is less challenging than disassembling a structure with other shapes. Therefore, using triangles in 3D design not only offers structural advantages but also simplifies the manufacturing process, saving time and effort.
The Importance of Print Orientation
When it comes to designing and printing objects using a 3D printer, the print orientation can significantly affect the final outcome. In some cases, the print orientation can be crucial and not considering it can lead to unfavorable results. It is important to carefully analyze and determine the best print orientation for your object to ensure optimal functionality and performance.
Suspension and Steering Mechanism Design
In the initial design of the suspension and steering mechanism, certain flaws were identified. One of the issues was the presence of a single suspension per wheel, which was insufficient to lift the front side of the car adequately. Additionally, the orientation of the servo caused a major problem when viewed from the top. This resulted in potential loss of control while driving. To rectify these problems, a complete redesign was necessary.
Redesigning the Suspension and Steering Mechanism
To overcome the issues with the suspension and steering mechanism, aligning the links with the arms proved to be the solution. By aligning these components, the problem of control loss could be effectively resolved. The redesign involved implementing two suspensions per wheel instead of just one. This modification ensured that the car could be lifted evenly without compromising stability. Furthermore, the steering angle remained consistent regardless of the movement of the mechanism.
Structural Support and Assembly
Another crucial aspect of designing the car was the structural support. The bottom of the car featured three millimeter rods that served as connectors between different parts. To enhance assembly, an additional rod was added in the middle. This addition ensured secure attachment and simplified the assembly process. By inserting the rods, sliding in the appropriate parts, and tightening the screws, both rear and front assemblies could be completed effectively.
The Importance of Structural Support
When it comes to building anything, be it a bag or a car, structural support plays a crucial role in ensuring its stability and longevity. The same applies to a homemade car project I recently undertook. In this article, we will delve into the significance of structural support in the context of this project.
The Role of the Fan
At first glance, you might assume that the fan in this car is designed solely for cooling down the motor. However, its main purpose is actually to secure the two axle mounts and prevent them from bending outwards. Despite using 16 millimeter M3 countersink screws, it was surprising to find that the fan case added an additional layer of support, effectively holding the car together.
Exploring Rotors and Gear Ratio
A crucial aspect of any car, especially one built from scratch, is its rotors and gear ratio. In my initial testing, a two-to-one gear ratio seemed promising, and I made sure the motor was capable of carrying the car’s weight. However, the first test turned out to be disappointing.
The Power of Rotors
To address the lack of torque, I decided to swap the 12.5 millimeter rotor with a larger 13.5 millimeter rotor. The difference was noticeable, and the car was able to reach a speed of 20 miles per hour, an improvement of 5 miles per hour. At this point, I had accepted that creating a fast car was not feasible, but I was determined to make it fun to drive.
The Challenge of Control
Although the lower gear ratio and larger rotor increased the car’s wheel torque, it also made it more challenging to control. This trade-off between fun and control is an important consideration in any project. It is crucial to strike the right balance to ensure an enjoyable and safe driving experience.
In conclusion, when embarking on a DIY car project or any construction endeavor, it is vital to prioritize structural support. Additionally, finding the right combination of rotors and gear ratio is key to achieving the desired performance and driveability. By understanding these elements and making necessary adjustments, you can create a car that is both thrilling to drive and safe to operate.
The Importance of Speed Testing in Mechanical Projects
Discovering the Sweet Spot
In the pursuit of creating efficient mechanical projects, speed testing plays a crucial role. It allows engineers and enthusiasts to determine the maximum speed their creations can achieve under different conditions. Through a series of tests and experiments, valuable insights can be gained, leading to improvements and optimizations. This article presents the findings from a personal speed test, highlighting the significance of the sweet spot in achieving higher speeds.
Initial Test Results
The first speed test yielded a modest 22 miles per hour at low throttle. While this provided a small boost of confidence, it was clear that there was room for improvement. However, with limited time for repairs, the decision was made to proceed with some broken parts. Surprisingly, this choice resulted in a slightly better speed of 27 miles per hour.
Unfortunate Gear Melting
On the fifth day of testing, an unfortunate incident occurred with the PLA gears, which melted badly. This unforeseen setback highlighted the importance of using durable materials in mechanical projects. It serves as a reminder that even small components can greatly impact overall performance.
Observations in Challenging Conditions
Seeking to push boundaries further and understand the project’s capabilities, testing was continued on the sixth and ninth days. Despite the rain on day six, the suspensions proved effective, allowing for a speed of 24 miles per hour. On day nine, with the determination to push the limits, the throttle was pressed all the way. The result was an impressive 41 miles per hour, breaking previous records.
Key Findings and Conclusions
From these speed tests, several noteworthy findings emerged. Firstly, it became evident that lower gear ratios do not always guarantee higher speeds. There exists a sweet spot, a balance between gear ratios and other factors that optimizes speed. This emphasizes the importance of careful experimentation and testing when aiming for maximum performance in mechanical projects.
The Path to Replication
For those interested in pursuing similar projects or replicating the findings, the resources used in this endeavor can be accessed. Steel files and instructional PDFs are available for download, paving the way for recreating this specific project. By exploring these resources, individuals can gain hands-on experience and further develop their understanding of mechanical engineering principles.
Sustainability Challenges and Support
The journey of creating and sharing mechanical projects through platforms like YouTube can be challenging. The lack of sustainable revenue often hinders progress and impedes ongoing efforts. To combat these obstacles, alternative support structures such as Patreon have emerged to provide creators with the means to continue their innovative work.
In conclusion, speed testing in mechanical projects is a vital process that allows engineers and enthusiasts to assess the performance and capability of their creations. The findings from these tests provide valuable insights, leading to improvements and optimizations. By understanding the sweet spot and exploring the available resources, individuals can embark on their own journey to create and replicate successful mechanical projects.
Building a High-Speed RC Car: From Failures to Success
Building a high-speed RC car that can reach an impressive 41 miles per hour is no easy feat. In this video, we are shown a summarized version of the process, but the actual journey is filled with numerous failures and months of prototyping. Let’s delve into the challenges, dedication, and triumphs involved in creating such a remarkable RC car.
Months of Prototypes and Failures
The road to success is paved with failures, and building a high-speed RC car is no exception. Countless prototypes, each slightly different from the last, were meticulously crafted and tested. It took several months of trial and error before the desired level of performance was achieved. Whether it was the choice of materials, the design of the chassis, or the selection of the motor, every aspect had to be carefully considered and refined.
Dedication and Patience
Creating a high-speed RC car requires a great deal of dedication and patience. It’s a labor-intensive process that demands attention to detail and a deep understanding of the mechanics involved. From researching available components to sourcing the necessary materials, every step requires careful planning and execution. The creator of this RC car demonstrated remarkable dedication throughout the entire process.
Sharing the Journey on Patreon
The creator of this RC car project has decided to share all future project files exclusively on their Patreon page. By doing so, they are able to support their continuous experimentation and development. While new projects will be available for a fee, all the designs and files that are already accessible for free on platforms like Thingiverse will remain accessible to enthusiasts worldwide.
Gratitude and Farewell
In conclusion, the process outlined in this video is just a glimpse of the tremendous effort and dedication it takes to build a high-speed RC car. As viewers, we must appreciate the countless failures and months of prototyping that led to this remarkable achievement. The creator signs off by expressing gratitude for the viewers’ support and promises to bring more exciting content in the future. Until then, happy racing!
Conclusion
Triangles play a crucial role in 3D design, providing stability, strength, and ease of manufacturing. Their use in trust figures allows for even distribution of forces, making them ideal for structures that bear heavy loads. Additionally, the simplicity of manufacturing triangular shapes using 3D printing further enhances their appeal. So, the next time you embark on a 3D design project, consider the power and advantages of triangles in creating a reliable and robust structure.
Consideration of print orientation is vital in 3D printing to achieve optimal results. In the case of the suspension and steering mechanism design, addressing the issues with a single suspension and incorrect servo orientation led to successful redesign and improved functionality. Additionally, the inclusion of extra structural supports enhanced the assembly process. By carefully analyzing and rectifying design flaws, a more efficient and reliable car was created.